PARK-FIT. Treadmill vs Cycling in Parkinson´s Disease. Definition of the Most Effective Model in Gait Reeducation

Inclusion Criteria: * Patient is diagnosed with idiopathic Parkinson's disease according to criteria from the United Kingdom Parkinson's Disease Society Brain Bank (UK-PDSBB) * H\&Y less than or equal to 2 * Stable drug treatment in the six weeks prior to the start of training and during the study. * Signature of informed consent. Exclusion Criteria: * Diagnosis of other neuro-degenerative disease * Cardiovascular disease or other systemic condition that contraindicates the moderate physical exercise * Need for ambulation support * Frequent freezing of gait events. * Mni- Mental State Examination (MMSE) \<26